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    <title>Document</title>
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    <!-- Rest参数与spread扩展运算符在ES6中已经引入，不过ES6中只针对于数组
    在ES9中为对象提供了像数组一样的rest参数和扩展运算符 -->
    <script>
        function connect({
            host,
            port,
            ...user
        }) {
            console.log(host);
            console.log(port);
            console.log(user);

        }
        connect({
            host: '127.0.0.1',
            port: 3306,
            username: 'root',
            password: 'root',
            type: 'master'
        })

        //对象合并
        const skillOne = {
            q: '天音波'
        }
        const skillTwo = {
            w: '金钟罩'
        }
        const skillThree = {
            e: '天雷破'
        }
        const skillFour = {
            r: '猛龙摆尾'
        }
        const mangseng = {...skillOne,
            ...skillTwo,
            ...skillThree,
            ...skillFour
        }
        console.log(mangseng);
    </script>
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